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Finding the Fourth Proportional to 19,110.70, 28,666.05 and 12,873.70

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Solution

The fourth proportional to 19,110.70, 28,666.05 and 12,873.70 is: 19,310.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,110.70 : 28,666.05 = 12,873.70 : x
  2. Step 2: Convert to fraction form
    19,110.70/28,666.05 = 12,873.70/x
  3. Step 3: Cross multiply
    19,110.70x = 28,666.05 × 12,873.70
  4. Step 4: Simplify right side
    19,110.70x = 369,038,127.89
  5. Step 5: Solve for x
    x = 369,038,127.89/19,110.70
  6. Step 6: Final answer
    x = 19,310.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.